*spoilers* cross posted from SHC.
I only played through this game once and it was years ago. My memory may be completely wonky about it. But I do remember a lot of crucial details. It started from viewing this thread, when it all hit me.
If anyone recalls the older works including many biblical and Abrahamic themes. Mostly from Catholicism and Jewish mysticism. I think Homecoming is deeper than people give it credit for.
Adam & Lilith?
It started when Homecoming was announced and the names of Alex's parents were revealed. Adam and Lilian. They seem at glance to be nothing, but there is a myth of Adam and Lilith.(Something at the time I commented on.) However, Lilian is not etymologically related to Lilith. (See "Lilith" and"Lily" for more info.) But it's common to mistake the origin of the name because of similar sounds. (Example.)
That doesn't matter because I still believe that Lilian is named after Lilith rather than the flower of death. (The name Lilian is a bit of a red herring and is too similar to be a coincidence.) Lilith is a Hebrew evil spirit (Also, a class of spirits.), who was said to have been Adam's first wife in the garden of Eden. Her myths come from Jewish folklore and Mysticism (Kabbalah.) as an explanation of the passage in Genesis that cites God as creating both sexes and then later saying it was only Adam and then he created Eve. (Genesis 1:27than compare God later creating woman from Adam's rib in Genesis 2:22.) Both Adam and Lilith, if we are to believe God is both genders, were created in the image of God.
She is sometimes referred to as "First Eve", but this is also mentioned of an anonymous woman who was Adam's first wife. Lilith was created at the same time as Adam. During mating Adam demanded to be on top saying he was the dominate one. Lilith refused to submit and said they were both equal. They wouldn't listen to each other so Lilith spoke the secret name of God and left Eden of her own free will. Later, she stayed by the red sea, which water attracts demons, there she copulated with demons and bore them children. God sent 3 angels to bring her back after Adam cried to God about it and she refused threatened to kill newborns unless an amulet with the angels' names were placed with the babies. (You can read the story here.) Depending on what legends you are going by, Lilith marries the prominent demon Ashmodai (Asmodeus) in Jewish folklore or the angel of death, Samael. (Yes, she is one of Samael's wives, he has four though. Also, Samael works for God btw.)
As we establish the connection, Lilith is also cited as a second serpent in Eden. Samael being the one who tempted Eve more so. There were two trees in Eden, the tree of the knowledge of good and evil and the tree of life. The knowledge tree is what Eve and Adam ate from, when they realized their nakedness. The tree of life however, is the tree of immortality. This will be important later on.
Cain & Abel?
With Alex and Joshua, in the game, Alex is jealous of Joshua who his parents favor. Although, Alex was planned as a sacrifice in their pact with God, so his parents took care not to get emotionally attached to him and favor Josh. It's interesting to know that Alexander means "defender of man"(1) and Joshua means "Yahweh is salvation".(2) I think their story is derived from the Cain and Abel story. In many myths Samael is said to be true father of Cain, and sometimes Lilith is said to be his true mother, but this is rare. (The Cain and Abel story is based on the Wooing of Inanna and show cases sordid history of farmers vs shepherds in ancient Mesopotamia. Inanna prefers farmers.) In some stories Cain and Abel were actually fighting over women, including one version that says the first Eve.(3)
In any case Cain kills Abel over jealousy as a motive. And so does Alex, even if Josh's death is accidental. God punished Cain with the "mark" (curse):""[The curse of Cain and the mark of Cain are phrases that originated from Genesis 4 where God declared that Cain, the firstborn son of Adam and Eve, be cursed for murdering his brother Abel. A mark was put upon him to warn others that killing Cain would provoke the vengeance of God, that if someone did something to harm Cain, the damage would come back sevenfold. Some interpretations view this as a physical mark, whereas other see the "mark" as a sign, and not as a physical marking on Cain himself. "" When people try to kill Alex in the game, bad things also seem to happen to them.